# April 22 - Utilities That Make Patches Work

## Focus
Treat VCAs, mixers, attenuverters, switches, and logic as musical modules.

## Modules
Tiptop VCA, Bubblesound HexVCA, Erogenous Tones VC8, Erogenous Tones Levita8, Doepfer A-130-1, Tiptop MISO, Doepfer A-138B, Intellijel Unity, 2hp Switch, Robaux DCSN-3, ADDAC-506 SignalFlow

## Manuals To Skim
Tiptop VCA, HexVCA, VC8, Levita8, A-130-1, MISO, A-138B, Intellijel Unity, 2hp Switch, DCSN-3, ADDAC-506

## 60-Minute Plan
1. `0:00-0:10` Rebuild a recent patch with explicit gain staging and attenuation on every modulation line.
2. `0:10-0:25` Use VCAs to make modulation depth itself dynamic.
3. `0:25-0:40` Use switches or sequential routing to alternate between two rhythmic or timbral states.
4. `0:40-0:55` Mix control voltages on purpose instead of only audio.
5. `0:55-1:00` Write down which utility changed the patch most while making no sound of its own.

## Questions
- Which problem disappeared once you attenuated properly?
- Did switching states feel more musical than adding more voices?
- Which VCA is best for audio and which for control?
- Where can a unity mixer save you from overpatching?
- What was the least glamorous but most important change today?